The documentation for bf_getbuffer at <http://www.python.org/doc/3.1/c-
api/typeobj.html#buffer-object-structures> claims:

<quote>
The signature of getbufferproc is int (PyObject *obj, PyObject *view, 
int flags). obj is the object to export, view is the Py_buffer struct to 
fill
</quote>

This is incorrect, the 'view' argument has type 'Py_buffer*'.

The same issue is also present in the 3.2 documentation (and I haven't 
checked the 2.6/2.7 docs yet)